[mclightning]

this is why servo-powered robotic arms are not interesting to me at all. I want one with brushless motors and harmonic or planetary drive gearbox. unfortunately you cant build those under $750 as far as I have seen so far. that's putting aside the added complexity. but I will definitely build one some day. there are quite few opensource projects with that setup.

I believe it offers higher torque, better precision and ability to just stick to a position with relatively low/or no power due to gearing-side resistance.